JPH028762B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a float type water intake device used in water treatment equipment.

BACKGROUND ART In general, solid-liquid separation is performed by sedimentation and concentration in sedimentation tanks, concentration tanks, etc. in water treatment equipment. The resulting supernatant water is conventionally discharged from an overflow weir fixed at a predetermined height.

Problems to be Solved by the Invention However, with a fixed overflow weir as described above, there is a problem in that if the water level of the supernatant water fluctuates rapidly, it becomes impossible to carry out continuous and efficient sedimentation and separation.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and to allow efficient sedimentation and separation by overflowing the supernatant water without any hindrance even if the water level fluctuates.

Means for Solving the Problems In order to solve the above problems, the present invention includes a drain pipe and a pair of vertical guide pipes in an aquarium, and a system in which the water level in the aquarium changes to allow the guide pipes to move along the pair of guide pipes. The float is provided with an overflow weir through which the supernatant water in the water tank overflows, and an overflow trough that receives the supernatant water that has exceeded the overflow weir, and in the guide pipe, A bellows-type water pipe is provided that communicates the overflow trough with the drain pipe and expands and contracts in accordance with the rise and fall of the float, and the float is sandwiched between a lock plate and the lock plate in the water tank. A lock lever is provided to fix the float at the upper limit position.

Function With this type of structure, the float is guided by the guide pipe and moves up and down in response to fluctuations in the water level in the tank, so the overflow weir installed on the float is always maintained at an appropriate level regardless of fluctuations in the water level. This means that it can be set at any height. In addition, due to the action of the bellows-type water pipe, the supernatant water in the overflow trough can be reliably guided to the drain pipe regardless of whether the float is raised or lowered. Furthermore, since the bellows-type water pipe is provided within the guide pipe, the overall configuration of the device can be made compact. Further, since the lock plate and the lock lever are provided to fix the float at the upper limit position, it is possible to prevent the float from rising or falling as necessary, regardless of fluctuations in the water level.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a water tank in a water treatment facility, into which water to be treated 2 is supplied. A pair of guide pipes 3 are provided in the water tank 1, and the upper and lower portions of the guide pipes 3 are supported in the vertical direction by brackets 4 and 5 projecting from the wall of the water tank 1. Further, inside the water tank 1, a drain pipe 6 is provided that faces the lower end opening of the guide pipe 3 and is guided to the outside of the water tank 1.

A float 7 is constructed so that the pair of guide pipes 3 pass through the float, and is moved up and down along the guide pipes 3 as the water level of the water to be treated 2 changes. The inside of the float 7 is divided into a plurality of air tanks 8 and a buoyancy adjustment tank 9, and a water inlet 10 provided in each buoyancy adjustment tank 9.
The draft of the float 7 can be adjusted by increasing or decreasing the amount of water in the tank 9. An upper limit stopper 11 for regulating the upper limit position of the float 7 is provided on the upper part of the guide pipe 3, and a similar lower limit stopper 12 is provided on the bracket 5. Also, on float 7,
A contact member 13 that comes into contact with each stopper 11, 12,
14 are provided.

Around the float 7, there is a perforated plate-shaped overflow weir 15.
An overflow trough 16 is provided, and the supernatant water in the water tank 1 can be introduced into the overflow trough 16. 17 is a full plate,
It is installed so that scum floating on the water surface does not flow into the overflow trough 16. Reference numeral 18 denotes a water collection pipe, which is composed of a T-shaped pipe for guiding water in the overflow trough 16 into the guide pipe 3.

Further, a bellows-type water pipe 19 is provided in the guide pipe 3 to communicate the water collection pipe 18 and the drain pipe 6. As shown in Fig. 3, the guide pipe 3
A through hole 20 for passing the water collection pipe 18 is formed in the through hole 20 so as not to impede movement of the water collection pipe 18 based on the raising and lowering of the float 7.
It is formed in the upper and lower elongated holes.

As shown in FIG. 2, a lock plate 21 and a lock lever 23 operated by an electric cylinder 22 are provided at a position corresponding to the contact member 13 when approaching the upper limit stopper 11. By sandwiching the float 7 between the lock plate 21 and the lock lever 23, the float 7
can be fixed at the upper limit position. 24
A guide roller is attached to the abutting member 13 to guide the abutting member 13 as it moves up and down along the lock plate 21.

In such a configuration, the water to be treated 2 supplied into the water tank 1 is separated into solid and liquid by sedimentation concentration.
The resulting supernatant water is transferred to the buffer plate 17.
The water is then guided to an overflow trough 16 via an overflow weir 15. At this time, the amount of water in the buoyancy adjustment tank 9 is adjusted in advance so that the upper end position of the overflow weir 15 is appropriate with respect to the water surface. The water in the overflow trough 16 is led to the drain pipe 6 via the water collection pipe 18 and the bellows-type water pipe 19, and is discharged to the outside of the water tank 1.

When the water level of the water to be treated 2 changes, the float 7 is guided by the guide pipe 3 and moves up and down accordingly. Therefore, the overflow weir 15 is always set at an appropriate height relative to the water surface, regardless of the above-mentioned fluctuations in the water level. In addition, when the float 7 moves up and down, the bellows-type water pipe 1
9 expands and contracts, the water in the overflow trough 16 is reliably guided to the drain pipe 6 regardless of whether the float 7 moves up or down. As a result, supernatant water can always be taken in a stable state regardless of fluctuations in the water level.

In addition, when the water level fluctuates extremely, the lifting and lowering of the float 7 is regulated by stoppers 11 and 12.
A large burden is not placed on the bellows-type water pipe 19, etc. Also, if necessary, the lock plate 21 and the lock lever 23 can be used to lock the float 7.
is fixed at the upper limit position and prevented from rising or falling.

Effects of the Invention As described above, according to the present invention, since an overflow weir is provided on the float, supernatant water can always be properly and efficiently taken in regardless of fluctuations in the water level in the tank. Because the water pipe is provided, the supernatant water in the overflow trough can be reliably led to the drain pipe regardless of whether the float is raised or lowered, and the float is clamped between the lock plate and the lock lever and fixed at the upper limit position. , regardless of water level fluctuations, the float can be prevented from rising or falling as necessary.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention when viewed from the front;
FIG. 2 is a cross-sectional side view thereof, and FIG. 3 is an external view of the guide pipe in the vicinity of the through hole. 1... Water tank, 2... Guide pipe, 6... Drain pipe, 7... Float, 15... Overflow weir, 16...
Overflow trough, 19... bellows type water pipe.

Claims (1)

[Scope of Claims] 1. A drain pipe, a pair of vertical guide pipes, and a float that moves up and down along the pair of guide pipes according to fluctuations in the water level in the water tank are provided in the water tank, and the float includes: An overflow weir through which the supernatant water in the water tank overflows, and an overflow trough that receives the supernatant water that has exceeded the overflow weir are provided, and the overflow trough and the drain pipe are communicated within the guide pipe. , a bellows-type water pipe that expands and contracts in accordance with the rise and fall of the float is provided, and the water tank is provided with a lock plate and a lock lever that clamps the float between the lock plate and fixes the float at an upper limit position. A float-type water intake device characterized by the following features: